Syntax

Initialization

Performance

These filters are Butterworth second-order IIR filters. They are slightly slower than the original filters in Csound, but they offer an almost flat passband and very good precision and stopband attenuation.

asig -- Input signal to be filtered.

xfreq -- Cutoff or center frequency for each of the filters.

xband -- Bandwidth of the bandpass and bandreject filters.

Examples

Here is an example of the butterbp opcode. It uses the file butterbp.csd.